Mariah Carey brought Christmas cheer to the National Building Museum in the nation’s capital for TNT’s “Christmas in Washington 2010.” Mimi was on hand to perform “One Child” and “O Come All Ye Faithful” as President Obama and the First Family looked on. The annual holiday special, which aired last night, also featured performances from Maxwell.

While in D.C., MC revealed to the First Family that she is having twins. “They, ironically enough, questioned my wife about, you know, ‘So, what are you having, are you having twins?'” said her husband Nick Cannon. “And because of the excitement, because of the emotion, she was overwhelmed [and] she shared with the President and First Lady that we are having twins.”